A5101770641- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Quantum Chromodynamics and Particle Interactions
- Particle Detector Development and Performance
- Dark Matter and Cosmic Phenomena
- Computational Physics and Python Applications
- Cosmology and Gravitation Theories
- Neutrino Physics Research
- Particle Accelerators and Free-Electron Lasers
- Photonic and Optical Devices
- Radiation Detection and Scintillator Technologies
- Medical Imaging Techniques and Applications
- Atomic and Subatomic Physics Research
- Particle accelerators and beam dynamics
- Astrophysics and Cosmic Phenomena
- Superconducting and THz Device Technology
- Gyrotron and Vacuum Electronics Research
- Electronic Packaging and Soldering Technologies
- Advanced Photonic Communication Systems
- Silicon Carbide Semiconductor Technologies
- CCD and CMOS Imaging Sensors
- Terahertz technology and applications
- 3D IC and TSV technologies
- Optical Network Technologies
- Advanced X-ray Imaging Techniques
Karlsruhe Institute of Technology
2016-2025
Institute of High Energy Physics
2012-2023
A. Alikhanyan National Laboratory
2022-2023
Siemens (Germany)
2019-2023
Institute of Nuclear and Particle Physics
2023
National Centre of Scientific Research "Demokritos"
2023
Comenius University Bratislava
2022
RWTH Aachen University
2000-2022
Computer History Museum
2013-2021
Stanford University
2020
Phytoplankton blooms characterize temperate ocean margin zones in spring. We investigated the bacterioplankton response to a diatom bloom North Sea and observed dynamic succession of populations at genus-level resolution. Taxonomically distinct expressions carbohydrate-active enzymes (transporters; particular, TonB-dependent transporters) phosphate acquisition strategies were found, indicating that Bacteroidetes, Gammaproteobacteria, Alphaproteobacteria are specialized for successive...
We present new experimental constraints on the elastic, spin-dependent WIMP-nucleon cross section using recent data from XENON100 experiment, operated in Laboratori Nazionali del Gran Sasso Italy. An analysis of 224.6 live days×34 kg exposure acquired during 2011 and 2012 revealed no excess signal due to axial-vector WIMP interactions with 129Xe 131Xe nuclei. This leads most stringent upper limits WIMP-neutron sections for masses above 6 GeV/c², a minimum 3.5×10(-40) cm² at mass 45 90%...
We report on an improved measurement of the $2\ensuremath{\nu}\ensuremath{\beta}\ensuremath{\beta}$ half-life ${}^{136}$Xe performed by EXO-200. The use a large and homogeneous time-projection chamber allows for precise estimate fiducial mass used measurement, resulting in small systematic uncertainty. also discuss detail data-analysis methods double-$\ensuremath{\beta}$ decay searches with EXO-200, while emphasizing those directly related to present measurement. is found be...
We present the first results of searches for axions and axion-like-particles with XENON100 experiment. The axion-electron coupling constant, $g_{Ae}$, has been probed by exploiting axio-electric effect in liquid xenon. A profile likelihood analysis 224.6 live days $\times$ 34 kg exposure shown no evidence a signal. By rejecting larger than $7.7 \times 10^{-12}$ (90\% CL) solar axion search, we set best limit to date on this coupling. In frame DFSZ KSVZ models, exclude QCD heavier 0.3...
Except for environmental 16S rRNA gene sequences, no information is available members of the candidate division OP3. These bacteria appear to thrive in anoxic environments, such as marine sediments, hypersaline deep sea, freshwater lakes, aquifers, flooded paddy soils and methanogenic bioreactors. The phylogeny suggests that OP3 belongs Planctomycetes/Verrucomicrobia/Chlamydiae (PVC) superphylum. Metagenomic fosmid libraries were constructed from soil screened gene-containing fragments...
The low-background, VUV-sensitive 3-inch diameter photomultiplier tube R11410 has been developed by Hamamatsu for dark matter direct detection experiments using liquid xenon as the target material. We present results from joint effort between XENON collaboration and company to produce a highly radio-pure photosensor (version R11410-21) XENON1T experiment. After introducing its components, we show methods of radioactive contamination measurements individual materials employed in production....
XENON is a dark matter direct detection project, consisting of time projection chamber (TPC) filled with liquid xenon as medium. The construction the next generation detector, XENON1T, presently taking place at Laboratori Nazionali del Gran Sasso (LNGS) in Italy. It aims sensitivity to spin-independent cross sections 2 · 10-47 c for WIMP masses around 50 GeV2, which requires background reduction by two orders magnitude compared XENON100, current detector. An active system that able tag muons...
The XENON100 experiment has recently completed a dark matter run with 100.9 live-days of data, taken from January to June 2010. Events in 48kg fiducial volume the energy range between 8.4 and 44.6 keVnr have been analyzed. A total three events found predefined signal region, compatible background prediction (1.8 \pm 0.6) events. Based on this analysis we present limits WIMP-nucleon cross section for inelastic matter. With data are able rule out explanation observed DAMA/LIBRA modulation as...
Laboratory experiments searching for galactic dark matter particles scattering off nuclei have so far not been able to establish a discovery. We use data from the XENON100 experiment search interacting with electrons. With no evidence signal above low background of our experiment, we exclude variety representative models that would induce electronic recoils. For axial-vector couplings electrons, cross-sections 6x10^(-35) cm^2 particle masses m_chi = 2 GeV/c^2. Independent halo, leptophilic...
The XENON100 dark matter experiment uses liquid xenon in a time projection chamber (TPC) to measure nuclear recoils resulting from the scattering of weakly interacting massive particles (WIMPs). In this paper, we report observation single-electron charge signals which are not related WIMP interactions. These signals, show excellent sensitivity detector small explained as being due photoionization impurities and metal components inside TPC. They used unique calibration source characterize...
We have searched for periodic variations of the electronic recoil event rate in (2-6) keV energy range recorded between February 2011 and March 2012 with XENON100 detector, adding up to 224.6 live days total. Following a detailed study establish stability detector its background contributions during this run, we performed an unbinned profile likelihood analysis identify any periodicity 500 days. find global significance less than 1σ all periods, suggesting no statistically significant...
We report on the development and construction of high-purity germanium spectrometer setup GIOVE (Germanium Inner Outer VEto), recently built now operated at shallow underground laboratory Max-Planck-Institut für Kernphysik, Heidelberg. Particular attention was paid to design a novel passive active shield, aiming efficient rejection environmental muon induced radiation backgrounds. The achieved sensitivity level $$\le $$ 100 $$\upmu Bq kg $$^{-1}$$ for primordial radionuclides from U Th in...
In this work we present an application of the Goertzel Filter for channelization multi-tonal signals, typically used read-out cryogenic sensors which are multiplexed in frequency domain (FDM), by means Microwave Superconducting Quantum Interference Device (SQUID) Multiplexer ($\mu$MUX). We demonstrate how implementing a bank many these filters, can be to perform input signal retrieve data added sensors. show approach implemented resource-efficient manner Field Programmable Gate Array (FPGA)...
Abstract A novel system formed by a Microwave Superconducting Quantum Interference Device (SQUID) Multiplexer ( $$\mu$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mi>μ</mml:mi> </mml:math> MUX) and room temperature electronics employs frequency division multiplexing (FDM) technique to read out multiple cryogenic detectors. Since the detector signal is embedded in phase of SQUID signal, Digital Quadrature Demodulator (DQD) widely implemented recover it. However, DQD also...
The continuous, non-intermitted service of electrical grids relies on the reliability their assets, e.g., power transformers. Local insulation defects can result in serve failures such as breakdowns with severe subsequent costs. prevention events is crucial. Hence, partial discharge (PD) activity at transformers evaluated directly factory before shipment. Additionally, PD be monitored during using ultra-high frequency (UHF) method. In this contribution, a calibration procedure proposed for...
Liquid xenon (LXe) is employed in a number of current and future detectors for rare event searches. We use the EXO-200 experimental data to measure absolute scintillation ionization yields generated by $\ensuremath{\gamma}$ interactions from $^{228}\mathrm{Th}$ (2615 keV), $^{226}\mathrm{Ra}$ (1764 $^{60}\mathrm{Co}$ (1332 keV 1173 keV) calibration sources, over range electric fields. The $W$ value that defines recombination-independent energy scale measured be...
We developed a versatile integrated control and readout instrument for experiments with superconducting quantum bits (qubits), based on field-programmable gate array (FPGA) platform. Using this platform, we perform measurement-based, closed-loop feedback operations $428 \, \mathrm{ns}$ platform latency. The capability is instrumental in realizing active reset initialization of the qubit into ground state time much shorter than its energy relaxation $T_1$. show experimental results...
A promising candidate for sensitive imaging of breast cancer is 3D Ultrasound Computer Tomography (3D USCT). So far its clinical applicability diagnosis has been limited by the duration demanding image reconstruction. In this paper we investigate how signal processing and reconstruction can be accelerated using heterogeneous hardware. Additionally, time costs real-time system a future therapy device estimated. Reusing device's built-in FPGA-based data acquisition (DAQ) through...
Abstract This work reports the performance evaluation of an SDR readout system based on latest generation (Gen3) AMD’s Radio-Frequency System-on-Chip (RFSoC) processing platform, which integrates a full-stack and powerful FPGA with up to 32 high-speed high-resolution 14-bit Digital-to-Analog Converters Analog-to-Digital Converters. The proposed uses previously developed multi-band, double-conversion IQ RF-mixing board targeting multiplexing factor approximately 1000 bolometers in bandwidth...
We developed a direct memory access (DMA) engine compatible with the Xilinx PCI Express (PCIe) core to provide high-performance and low-occupancy alternative commercial solutions. In order maximize PCIe throughput while minimizing FPGA resources utilization, DMA adopts novel strategy where address list is stored inside not in central of host CPU. The design package complemented simple register control by Linux driver. Families 6 7, operates endpoint Generation 1 2 all lane configurations...
The dependence of the light and charge yield liquid xenon on applied electric field recoil energy is important for dark matter detectors using time projections chambers. Few measurements have been made this at energies less than 10 keV. In paper, we present results such a specialized detector. Recoil are determined via Compton coincidence technique four drift fields relevant detectors: 0.19, 0.48, 1.02, $2.32\text{ }\text{ }\mathrm{kV}/\mathrm{cm}$. Mean down to 1 keV were measured with...